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What is Valve?

Valve is a device that comes in piping system, to manage the fluid under service.

Function of Valve:

n  To start & Stop flow.

n  To regulate the flow or pressure.

n  To allow uni directional flow - Preventing Reverse flow.

n  Safety or Relief of over pressure to prevent catastrophic damage of system components.

Classification of Valves

According to Operational Features:

v  Isolation Type - Start & Stop Flow

·    Gate Valve

·    Plug Valve

·    Ball Valve

v  Regulation Type

v  Check Type - Preventing Reverse Flow

v  Safety or Relief Type

v  Special Applications

   According to Name of it’s Design:

·    Gate Valve

·    Ball Valve

·    Plug Valve

·    Butterfly Valve

·    Globe Valve

·    Needle Valve

·    Diaphragm Valve

·    Check Valve

·    Angle Valve 

   According to Mechanical Construction:

v  STEM

·    Raising Stem

·    Non Raising Stem

v  BONNET

·    Bolted Bonnet

·    Screwed Bonnet

·    Welded Bonnet

v  GLAND BOX

·    Packing Type

·    Bellows Sealed

   According to Type of End Connection:

v  FLANGED CONNECTION       

v  SCREWED CONNECTION

v  WELDED CONNECTION

·    Socket welded

·    Butt Welded

  According to Mode of Operation:

v  HAND OPERATED

·   Hand Wheel

·   Lever

ü  Remote Hand Operated

·   Chain

·   Teleflex Cable

·   Teleflex Shaft

v  MOTOR OPERATED

v  PNEUMATIC OPERATED

v  PILOT OPERATED

v  SOLENOID OPERATED